Ultraviolet ray screening agent

Details Ultraviolet ray screening agent Ultraviolet ray screening agent

1992-09-02

1994-06-14

Klemanski, Helene

Compositions: coating or plastic

Materials or ingredients

Pigment, filler, or aggregate compositions, e.g., stone,...

106417, 4733283, C04B 1420, C01B 3300

Patent

active

053206746

ABSTRACT:
A composite synthetic mica powder having an excellent ultraviolet ray screening effect, the composite synthetic mica powder comprising a fine particle layer (B) containing one or more types of elements selected from the group of Te, Bi, Pb, Ce, Fe, Mo, Nb, W, Sb, Sn, V, Mn, Ni, Co, Zn and Ti is formed on the surface of scale-like mica particles (A). The covering ratio of particles (A) by particles (B) is in the range of 0.5 to 1; the ratio of particle size of the particles (B) to plane direction diameter of the particles (A) is 0.1 or less; and particle size of the particles (A) is 1 to 100 .mu.m. Also, a red synthetic mica which develops light-resistant red color closer to the color of human skin and ultraviolet rays, a method for manufacturing the same, and an ultraviolet ray screening agent which contains the synthetic mica. The synthetic mica is expressed by the following formula (I):

REFERENCES:
patent: 4067819 (1978-01-01), Daimon et al.
patent: 5023065 (1991-06-01), Ohno et al.
patent: 5094852 (1992-03-01), Ohno et al.

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